I am surprised you said things and not even mention drums.
I only use parallel compression on my kick and snare.
there's other ways to making your sound pop with use of buss effects and layering, and then group compression, to make your musical instrumentation pop.
But i just tend to stick with parallel on the drums, for me that's where i feel the best results are located for that particular technique.
I left out the things I thought were obvious to use them on, I'm currently using it on my Kick, Percussion, Plucks/Piano and Leads I wrote the ones I was unsure of
Another question, am I routing it correctly? EG: I have my percussion bus sending to the parallel compression bus and both of them routed out to stereo out. Should I be routing the parallel compression bus back into the percussion bus?
Edit: I use them on my synth leads for example because I asked Alex Klingle about what he though of one of my tracks and thats what he recommended. He said my leads needed to be more "glued together" and said he uses this on some of his. I immediately noticed that the sound was definitely more focussed and powerful once I did that, I usually have 3 synth layers working together for a strong lead